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authorLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
committerLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
commit9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch)
tree0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/setuptools/_distutils/command/build_clib.py
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+"""distutils.command.build_clib
+
+Implements the Distutils 'build_clib' command, to build a C/C++ library
+that is included in the module distribution and needed by an extension
+module."""
+
+
+# XXX this module has *lots* of code ripped-off quite transparently from
+# build_ext.py -- not surprisingly really, as the work required to build
+# a static library from a collection of C source files is not really all
+# that different from what's required to build a shared object file from
+# a collection of C source files. Nevertheless, I haven't done the
+# necessary refactoring to account for the overlap in code between the
+# two modules, mainly because a number of subtle details changed in the
+# cut 'n paste. Sigh.
+
+import os
+from distutils.core import Command
+from distutils.errors import *
+from distutils.sysconfig import customize_compiler
+from distutils import log
+
+
+def show_compilers():
+ from distutils.ccompiler import show_compilers
+
+ show_compilers()
+
+
+class build_clib(Command):
+
+ description = "build C/C++ libraries used by Python extensions"
+
+ user_options = [
+ ('build-clib=', 'b', "directory to build C/C++ libraries to"),
+ ('build-temp=', 't', "directory to put temporary build by-products"),
+ ('debug', 'g', "compile with debugging information"),
+ ('force', 'f', "forcibly build everything (ignore file timestamps)"),
+ ('compiler=', 'c', "specify the compiler type"),
+ ]
+
+ boolean_options = ['debug', 'force']
+
+ help_options = [
+ ('help-compiler', None, "list available compilers", show_compilers),
+ ]
+
+ def initialize_options(self):
+ self.build_clib = None
+ self.build_temp = None
+
+ # List of libraries to build
+ self.libraries = None
+
+ # Compilation options for all libraries
+ self.include_dirs = None
+ self.define = None
+ self.undef = None
+ self.debug = None
+ self.force = 0
+ self.compiler = None
+
+ def finalize_options(self):
+ # This might be confusing: both build-clib and build-temp default
+ # to build-temp as defined by the "build" command. This is because
+ # I think that C libraries are really just temporary build
+ # by-products, at least from the point of view of building Python
+ # extensions -- but I want to keep my options open.
+ self.set_undefined_options(
+ 'build',
+ ('build_temp', 'build_clib'),
+ ('build_temp', 'build_temp'),
+ ('compiler', 'compiler'),
+ ('debug', 'debug'),
+ ('force', 'force'),
+ )
+
+ self.libraries = self.distribution.libraries
+ if self.libraries:
+ self.check_library_list(self.libraries)
+
+ if self.include_dirs is None:
+ self.include_dirs = self.distribution.include_dirs or []
+ if isinstance(self.include_dirs, str):
+ self.include_dirs = self.include_dirs.split(os.pathsep)
+
+ # XXX same as for build_ext -- what about 'self.define' and
+ # 'self.undef' ?
+
+ def run(self):
+ if not self.libraries:
+ return
+
+ # Yech -- this is cut 'n pasted from build_ext.py!
+ from distutils.ccompiler import new_compiler
+
+ self.compiler = new_compiler(
+ compiler=self.compiler, dry_run=self.dry_run, force=self.force
+ )
+ customize_compiler(self.compiler)
+
+ if self.include_dirs is not None:
+ self.compiler.set_include_dirs(self.include_dirs)
+ if self.define is not None:
+ # 'define' option is a list of (name,value) tuples
+ for (name, value) in self.define:
+ self.compiler.define_macro(name, value)
+ if self.undef is not None:
+ for macro in self.undef:
+ self.compiler.undefine_macro(macro)
+
+ self.build_libraries(self.libraries)
+
+ def check_library_list(self, libraries):
+ """Ensure that the list of libraries is valid.
+
+ `library` is presumably provided as a command option 'libraries'.
+ This method checks that it is a list of 2-tuples, where the tuples
+ are (library_name, build_info_dict).
+
+ Raise DistutilsSetupError if the structure is invalid anywhere;
+ just returns otherwise.
+ """
+ if not isinstance(libraries, list):
+ raise DistutilsSetupError("'libraries' option must be a list of tuples")
+
+ for lib in libraries:
+ if not isinstance(lib, tuple) and len(lib) != 2:
+ raise DistutilsSetupError("each element of 'libraries' must a 2-tuple")
+
+ name, build_info = lib
+
+ if not isinstance(name, str):
+ raise DistutilsSetupError(
+ "first element of each tuple in 'libraries' "
+ "must be a string (the library name)"
+ )
+
+ if '/' in name or (os.sep != '/' and os.sep in name):
+ raise DistutilsSetupError(
+ "bad library name '%s': "
+ "may not contain directory separators" % lib[0]
+ )
+
+ if not isinstance(build_info, dict):
+ raise DistutilsSetupError(
+ "second element of each tuple in 'libraries' "
+ "must be a dictionary (build info)"
+ )
+
+ def get_library_names(self):
+ # Assume the library list is valid -- 'check_library_list()' is
+ # called from 'finalize_options()', so it should be!
+ if not self.libraries:
+ return None
+
+ lib_names = []
+ for (lib_name, build_info) in self.libraries:
+ lib_names.append(lib_name)
+ return lib_names
+
+ def get_source_files(self):
+ self.check_library_list(self.libraries)
+ filenames = []
+ for (lib_name, build_info) in self.libraries:
+ sources = build_info.get('sources')
+ if sources is None or not isinstance(sources, (list, tuple)):
+ raise DistutilsSetupError(
+ "in 'libraries' option (library '%s'), "
+ "'sources' must be present and must be "
+ "a list of source filenames" % lib_name
+ )
+
+ filenames.extend(sources)
+ return filenames
+
+ def build_libraries(self, libraries):
+ for (lib_name, build_info) in libraries:
+ sources = build_info.get('sources')
+ if sources is None or not isinstance(sources, (list, tuple)):
+ raise DistutilsSetupError(
+ "in 'libraries' option (library '%s'), "
+ "'sources' must be present and must be "
+ "a list of source filenames" % lib_name
+ )
+ sources = list(sources)
+
+ log.info("building '%s' library", lib_name)
+
+ # First, compile the source code to object files in the library
+ # directory. (This should probably change to putting object
+ # files in a temporary build directory.)
+ macros = build_info.get('macros')
+ include_dirs = build_info.get('include_dirs')
+ objects = self.compiler.compile(
+ sources,
+ output_dir=self.build_temp,
+ macros=macros,
+ include_dirs=include_dirs,
+ debug=self.debug,
+ )
+
+ # Now "link" the object files together into a static library.
+ # (On Unix at least, this isn't really linking -- it just
+ # builds an archive. Whatever.)
+ self.compiler.create_static_lib(
+ objects, lib_name, output_dir=self.build_clib, debug=self.debug
+ )